docs: def my_address_string(self):
          """ For logging client host without resolving. """
          addr = getattr(self, 'client_address', ('', None))[0]
  
          # If listed in proxy_ips, use the X-Forwarded-For header, if present.
          if addr in self.proxy_ips:
              return self.headers.getheader('x-forwarded-for', addr)
          return addr